Multichannel digital measurement and control system based on I2C and CAN bus (inter-integrated circuit and controller area network bus)

Abstract

The invention provides a multichannel digital measurement and control system based on I2C and CAN bus (inter-integrated circuit and controller area network bus), comprising master controller unit (1),I2C bus isolating unit (2), I2C bus driving unit (3), I / O (input / output) parallel extension unit (4), I / O isolating unit (5), CAN bus isolating unit (6), CAN bus output protection unit (7) and user interface unit (8). The multichannel digital measurement and control system based on I2C and CAN bus has the advantages that parameter setting is flexible and convenient, quick, stable and seamless switching can be provided, reliability and speediness of the multichannel digital input / output measurement and control system are guaranteed, and the system is adaptive to workplaces with complex electromagnetic environment, long transmission distance and high communication accuracy.

Description

technical field [0001] The invention belongs to the field of embedded technology, and in particular relates to a multi-channel digital measurement and control system based on I2C+CAN bus. Background technique [0002] Research and operation practice show that the I2C bus and CAN bus communication methods using conventional methods will often be interfered in application sites with strong electromagnetic interference (such as the integrated power system of ships, which is one of the very typical application environments). Reliability cannot be guaranteed, and therefore, it is impossible to meet the information exchange demands of the "blowout" growth of the system. The main reasons are reflected in the following aspects: [0003] (1) The all-electric propulsion system of the ship's integrated power system includes many functions such as power generation, power transmission, power distribution, power transformation, dragging, propulsion, energy storage, monitoring, and power ...

AI Technical Summary

Problems solved by technology

This is because the system has the particularity of multi-subsystems with complex functions and multiple power electronic components controlled by PWM, which will inevitably bring about serious electromagnetic compatibility problems, which will inevitably cause harm to the normal operation of communication equipment;

[0004] (2) During the voyage of electric propulsion ships, they are disturbed by various random uncertain factors such as wind, waves and ocean currents, which will lead to an imbalance between the ship's output power and load power, and even undervoltage and overvoltage This will also have a fatal impact on communication equipment;

[0005] (3) The working environment of ship data acquisition equipment is complex and changeable. Due to the influence of many factors such as transmission distance and on-site conditions, the transmission channels of I2C bus and CAN bus may be interrupted, resulting in the reduction of real-time performance and reliability of the network, and even causing network system failure. Can not work normally

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